diff --git a/gigalixir/__init__.py b/gigalixir/__init__.py
index 71397db..7de56d7 100644
--- a/gigalixir/__init__.py
+++ b/gigalixir/__init__.py
@@ -1,8 +1,10 @@
 from .shell import cast, call
 from .routers.linux import LinuxRouter
 from .routers.darwin import DarwinRouter
+from .routers.windows import WindowsRouter
 from .openers.linux import LinuxOpener
 from .openers.darwin import DarwinOpener
+from .openers.windows import WindowsOpener
 from . import observer as gigalixir_observer
 from . import user as gigalixir_user
 from . import app as gigalixir_app
@@ -33,6 +35,7 @@
 import json
 import netrc
 import os
+import platform
 from functools import wraps
 import pkg_resources
 
@@ -220,13 +223,20 @@ def cli(ctx, env):
 
     ctx.obj['host'] = host
 
-    PLATFORM = call("uname -s").lower() # linux or darwin
+    PLATFORM = platform.system().lower() # linux, darwin, or windows
     if PLATFORM == "linux":
         ctx.obj['router'] = LinuxRouter()
         ctx.obj['opener'] = LinuxOpener()
     elif PLATFORM == "darwin":
         ctx.obj['router'] = DarwinRouter()
         ctx.obj['opener'] = DarwinOpener()
+    elif PLATFORM == "windows":
+        try:
+            os.environ['HOME']
+        except KeyError:
+            os.environ['HOME'] = os.environ['USERPROFILE']
+        ctx.obj['router'] = WindowsRouter()
+        ctx.obj['opener'] = WindowsOpener()
     else:
         raise Exception("Unknown platform: %s" % PLATFORM)
 
diff --git a/gigalixir/api_key.py b/gigalixir/api_key.py
index fd9cc99..b339fc8 100644
--- a/gigalixir/api_key.py
+++ b/gigalixir/api_key.py
@@ -13,7 +13,7 @@ def regenerate(host, email, password, yes):
         raise Exception(r.text)
     else:
         key = json.loads(r.text)["data"]["key"]
-        if yes or click.confirm('Would you like to save your api key to your ~/.netrc file?'):
+        if yes or click.confirm('Would you like to save your api key to your ~/%s file?' % netrc.netrc_name()):
             netrc.update_netrc(email, key)
         else:
             logging.getLogger("gigalixir-cli").info('Your api key is %s' % key)
diff --git a/gigalixir/netrc.py b/gigalixir/netrc.py
index 40f22be..cb2f32b 100644
--- a/gigalixir/netrc.py
+++ b/gigalixir/netrc.py
@@ -1,41 +1,42 @@
 from __future__ import absolute_import
 import netrc
 import os
+import platform
 
-def clear_netrc():
+def netrc_name():
+    if platform.system().lower() == 'windows':
+        return "_netrc"
+    else:
+        return ".netrc"
+
+def get_netrc_file():
     # TODO: support netrc files in locations other than ~/.netrc
+    fname = os.path.join(os.environ['HOME'], netrc_name())
     try:
-        netrc_file = netrc.netrc()
+        netrc_file = netrc.netrc(fname)
     except IOError:
         # if netrc does not exist, touch it
         # from: http://stackoverflow.com/questions/1158076/implement-touch-using-python
-        fname = os.path.join(os.environ['HOME'], ".netrc")
         with open(fname, 'a'):
                 os.utime(fname, None)
-        netrc_file = netrc.netrc()
+        netrc_file = netrc.netrc(fname)
+    
+    return netrc_file, fname
+
+def clear_netrc():
+    netrc_file, fname = get_netrc_file()
 
     del netrc_file.hosts['git.gigalixir.com'] 
     del netrc_file.hosts['api.gigalixir.com']
-    file = os.path.join(os.environ['HOME'], ".netrc")
-    with open(file, 'w') as fp:
+    with open(fname, 'w') as fp:
         fp.write(netrc_repr(netrc_file))
 
 def update_netrc(email, key):
-    # TODO: support netrc files in locations other than ~/.netrc
-    try:
-        netrc_file = netrc.netrc()
-    except IOError:
-        # if netrc does not exist, touch it
-        # from: http://stackoverflow.com/questions/1158076/implement-touch-using-python
-        fname = os.path.join(os.environ['HOME'], ".netrc")
-        with open(fname, 'a'):
-                os.utime(fname, None)
-        netrc_file = netrc.netrc()
+    netrc_file, fname = get_netrc_file()
 
     netrc_file.hosts['git.gigalixir.com'] = (email, None, key)
     netrc_file.hosts['api.gigalixir.com'] = (email, None, key)
-    file = os.path.join(os.environ['HOME'], ".netrc")
-    with open(file, 'w') as fp:
+    with open(fname, 'w') as fp:
         fp.write(netrc_repr(netrc_file))
 
 # Copied from https://github.com/enthought/Python-2.7.3/blob/master/Lib/netrc.py#L105
diff --git a/gigalixir/observer.py b/gigalixir/observer.py
index dcae417..81a98b1 100644
--- a/gigalixir/observer.py
+++ b/gigalixir/observer.py
@@ -14,6 +14,9 @@
 from six.moves.urllib.parse import quote
 
 def observer(ctx, app_name, erlang_cookie=None, ssh_opts=""):
+    if not ctx.obj['router'].supports_multiplexing():
+        raise Exception("The observer command is not supported on this platform.")
+
     host = ctx.obj['host']
     r = requests.get('%s/api/apps/%s/observer-commands' % (host, quote(app_name.encode('utf-8'))), headers = {
         'Content-Type': 'application/json',
@@ -134,6 +137,8 @@ def ensure_port_free(port):
         # if the port is in use, then a pid is found, this "succeeds" and continues
         # if the port is free, then a pid is not found, this "fails" and raises a CalledProcessError
         pid = call("lsof -wni tcp:%(port)s -t" % {"port": port})
+        # If multiplexing gets supported later, on Windows this command would be: 
+        #   pid = call("netstat -p tcp -n | find \"\"\":%(port)s\"\"\" % {"port": port})
         raise Exception("It looks like process %s is using port %s on your local machine. We need this port to be able to connect observer. Please kill this process on your local machine and try again. e.g. `kill %s`" % (pid, port, pid))
     except subprocess.CalledProcessError:
         # success! continue
diff --git a/gigalixir/openers/windows.py b/gigalixir/openers/windows.py
new file mode 100644
index 0000000..a49bfae
--- /dev/null
+++ b/gigalixir/openers/windows.py
@@ -0,0 +1,8 @@
+from gigalixir.shell import cast
+import logging
+
+class WindowsOpener(object):
+    def open(self, url):
+        logging.getLogger("gigalixir-cli").info("Running: start %s" % url)
+        cast("start %s" % url)
+
diff --git a/gigalixir/routers/darwin.py b/gigalixir/routers/darwin.py
index 7591323..783ba37 100644
--- a/gigalixir/routers/darwin.py
+++ b/gigalixir/routers/darwin.py
@@ -27,3 +27,5 @@ def unroute_to_localhost(self, ip):
         cast("sudo ifconfig lo0 %s netmask 255.255.255.255 -alias" % ip)
         subprocess.call("sudo pfctl -ef /etc/pf.conf".split())
 
+    def supports_multiplexing():
+        return True
diff --git a/gigalixir/routers/linux.py b/gigalixir/routers/linux.py
index 10bfdec..13ca02b 100644
--- a/gigalixir/routers/linux.py
+++ b/gigalixir/routers/linux.py
@@ -13,3 +13,6 @@ def unroute_to_localhost(self, ip):
         logging.getLogger("gigalixir-cli").info("If prompted, please enter your sudo password:")
         cast("sudo iptables -t nat -D OUTPUT -p all -d %(ip)s -j DNAT --to-destination 127.0.0.1" % {"ip": ip})
         # cast("sudo iptables -t nat -L OUTPUT")
+
+    def supports_multiplexing():
+        return True
\ No newline at end of file
diff --git a/gigalixir/routers/windows.py b/gigalixir/routers/windows.py
new file mode 100644
index 0000000..5e8b1fb
--- /dev/null
+++ b/gigalixir/routers/windows.py
@@ -0,0 +1,16 @@
+from gigalixir.shell import cast
+import logging
+
+class WindowsRouter(object):
+    def route_to_localhost(self, ip, epmd_port, distribution_port):
+        # NOTE: Untested as multiplexing not supported on platform
+        logging.getLogger("gigalixir-cli").info("Setting up route")
+        cast("route ADD %s MASK 255.255.255.255 127.0.0.1" % ip)
+
+    def unroute_to_localhost(self, ip):
+        # NOTE: Untested as multiplexing not supported on platform
+        logging.getLogger("gigalixir-cli").info("Cleaning up route")
+        cast("route delete %s" % ip)
+
+    def supports_multiplexing(self):
+        return False
\ No newline at end of file
diff --git a/test/gigalixir_test.py b/test/gigalixir_test.py
index ebbe626..8b9e449 100644
--- a/test/gigalixir_test.py
+++ b/test/gigalixir_test.py
@@ -6,6 +6,13 @@
 import click
 from click.testing import CliRunner
 import httpretty
+import platform
+
+def netrc_name():
+    if platform.system().lower() == 'windows':
+        return "_netrc"
+    else:
+        return ".netrc"
 
 @httpretty.activate
 def test_create_user():
@@ -23,7 +30,7 @@ def test_logout():
     # Make sure this test does not modify the user's netrc file.
     with runner.isolated_filesystem():
         os.environ['HOME'] = '.'
-        with open('.netrc', 'w') as f:
+        with open(netrc_name(), 'w') as f:
             f.write("""machine api.gigalixir.com
 \tlogin foo@gigalixir.com
 \tpassword fake-api-key
@@ -34,11 +41,11 @@ def test_logout():
 \tlogin foo
 \tpassword fake-password
 """)
-            os.chmod(".netrc", 0o600)
+            os.chmod(netrc_name(), 0o600)
         result = runner.invoke(gigalixir.cli, ['logout'])
         assert result.output == ''
         assert result.exit_code == 0
-        with open('.netrc') as f:
+        with open(netrc_name()) as f:
             assert f.read() == """machine github.com
 \tlogin foo
 \tpassword fake-password
@@ -54,7 +61,7 @@ def test_login():
         os.environ['HOME'] = '.'
         result = runner.invoke(gigalixir.cli, ['login', '--email=foo@gigalixir.com'], input="password\ny\n")
         assert result.exit_code == 0
-        with open('.netrc') as f:
+        with open(netrc_name()) as f:
             assert f.read() == """machine api.gigalixir.com
 \tlogin foo@gigalixir.com
 \tpassword fake-api-key
@@ -75,7 +82,7 @@ def test_login_escaping():
         os.environ['HOME'] = '.'
         result = runner.invoke(gigalixir.cli, ['login', '--email=foo@gigalixir.com'], input="p:assword\ny\n")
         assert result.exit_code == 0
-        with open('.netrc') as f:
+        with open(netrc_name()) as f:
             assert f.read() == """machine api.gigalixir.com
 \tlogin foo@gigalixir.com
 \tpassword fake-api-key
@@ -274,7 +281,7 @@ def test_create_api_key():
         os.environ['HOME'] = '.'
         result = runner.invoke(gigalixir.cli, ['reset_api_key', '--email=foo@gigalixir.com'], input="password\ny\n")
         assert result.exit_code == 0
-        with open('.netrc') as f:
+        with open(netrc_name()) as f:
             assert f.read() == """machine api.gigalixir.com
 \tlogin foo@gigalixir.com
 \tpassword another-fake-api-key